This is shown on the schematic. It appears you may have an early board. The PIN diodes are different also. This pair of PINs are used to inject the calibrator signal.
On Mon, 03 Feb 2025 10:57:20 -0800
"Michael Jensen via groups.io" <kavigal@...> wrote:
On further inspection I found this:
Those 2 pin diodes connected to a cap? It looks like some modification, how ever I see no holes in the PCB where those 2 pin diodes would go otherwise.
Early version of this board and legit or?
--
73
-Jim
NU0C
Jim Shorney
